In Windows 7, click the Start button on the taskbar. Click Control Panel in the Start menu. You can also type "Display" in the search field upon clicking the Start button. In Windows 8, swipe in from the right side of the screen, and type "Display" in the Search field. Alternatively, hover the cursor over the upper-right corner of the screen to bring up the Charms bar, and type "Display" in the Search field.

Configure your settings

Click the Settings tab in the new window. The new tab reveals various settings for configuring your resolution. You can also click Advanced to configure the refresh rate.

Adjust the resolution

Use the slider to adjust the screen resolution. Pick a resolution, and click Apply. Wait for the screen to adjust. If the shaking stops, press OK. If it continues, pick another resolution. If all else fails, visit the manufacturer's website for your computer, and download the latest supported drivers for your graphics card and additional hardware.